Survival Tip: All about SIM Card in South Korea! (Prepaid SIM Card for foreigners)

Do you want to use your phone in Korea with a prepaid SIM Card?

No worries! We’ve got you covered. 😉

Before getting a SIM Card


1. Check whether your phone is unlocked or not. If your phone is locked, call your mobile phone carrier to unlock it.

*If you are from US, Canada, or Japan, make sure you check with your carrier before traveling to Korea. If your phone device is locked, you won’t be able to use some of the prepaid SIM Cards.

2. Make sure your device supports GSM network frequencies. You can find all the info about your phone device via GSM Arena website, or to see if your mobile is compatible with Korean mobile carrier networks, click here. Then see if your device supports one of GSM network frequencies below:

  • 4G LTE Bands: Band 1(2100MHz), Band 3(1800MHz), Band 8(900MHz)
  • 3G Bands: HSDPA 2100MHz/HSDPA+

1. Where to buy a SIM Card


The most convenient and the easiest way to buy a SIM Card is to buy it online in advance.

To buy it offline, you can purchase it at major convenience stores, Incheon Airport or outlets run by Korean mobile service providers: KT, SKT, LG U+.

Small convenience store chains like Mini Stops or Family Mart sometimes don’t have SIM Cards in store, so visit major convenience store chains like GS25, CU or Seven Eleven.

2. Choosing the right SIM Card type


Usually, most iPhone devices use a Nano SIM and most Android phones use a Micro SIM, but it’s best to check the specifications of your phone.

If you are using iPhone (iPhone 5/5S/6/6S or up), Galaxy Alpha, Galaxy 6 or up, then you need to get a Nano SIM. If you are using Galaxy 3/4/5, Huawei, HTC Desire, HTC Sensation, you should get a Dual SIM (Micro+Standard SIM). The price varies depending on the type of SIM (Nano SIM Card is more expensive than the Dual SIM Card).

USIM Card works on any phone!

Nevertheless, we highly recommend you to buy a USIM Card (Universal Subscriber Identity Module Card), a universal type which is compatible with phones using Standard, Micro or Nano SIM. USIM Card saves all your work!

After choosing the right SIM Card, decide how much you want to top up. You may find the same type of SIM Cards but with different prices. If you are buying a SIM Card for the first time, the price includes the fee for the card and the rest of the amount will be for top-up.

For example, if you buy a card with the price of 30,000 won, the fee of the card is 10,000 won and the rest of the amount is the top-up.

3. Activating your SIM Card


When you purchase a SIM Card, you also get a manual including how to activate the card. Follow the manual to activate the SIM Card.

Make sure to turn on and off your phone several times when you first insert the new SIM Card on your phone.

4. Topping up your SIM Card


Top-ups can be made at any convenience stores in Korea. If you need more assistance in English, visit the offline outlet run by your operator.

Know where your operator’s outlets are located in case you need to top up or extend your SIM Card.

If your SIM Card terminates, recharge or extension is not feasible, so make sure you recharge from time to time before your SIM Card expires and terminates.

1) Convenience stores: Recharging is available 24/7 at CU, 7-Eleven and GS25. Data can be recharged as unlimited and costs 10,000 KRW/500MB.

  • 7-Eleven or GS25: You just have to simply show your Korean phone number and pay your desired amount for top-up to the clerk.
  • CU: At CU convenience stores, you have to top-up on your own. The clerk will give you a receipt with PIN codes with 11 digits. Then call 080-013-0114 (free) and follow the instructions on the line. After recharge, you will be notified by SMS.

2) Offline outlets: Top-ups can be made in outlets of your SIM Card’s operator. Check the location and visit the store.

5. Extending your SIM Card plan


For those who want to extend the expiry date of their SIM Card plan, visit the outlets of the operator or contact them directly.

If your SIM Card terminates, any recharge or extension is not feasible. So make sure you check and recharge your plan from time to time before your card expires and terminates.

When you visit the outlet, you must have an Alien Registration Card (ARC) before your SIM Card gets terminated.

Which prepaid SIM Card should I buy?


1. SIM Card – Unlimited 4G/LTE Data Only & No Voice Calls (5/10/30 day)

| Ideal for: short-term visitors & business travelers who only need data

For those of you who want to get connected 24/7 in Korea, here’s a SIM card with unlimited 4G LTE data usage.

This data-only prepaid SIM Card is provided by the largest wireless operator in Korea, KT (Olleh) and you can also share the internet connection with other devices via tethering.

▷ For more info or to purchase the SIM Card, click here.

SIM Card Options (5-day/10-day/30-day)

Option Included
1) 5-day SIM card
– SIM card (universal type)
– Unlimited 4G LTE data for 120 hours (5 days)
after you pick up the SIM card
2) 10-day SIM card
– SIM card (universal type)
– Unlimited 4G LTE data for 240 hours (10 days)
after you pick up the SIM card
3) 30-day SIM card
– SIM card (universal type)
– Unlimited 4G LTE data for 720 hours (30 days)
after you pick up the SIM card

| Pick-up locations: Incheon International Airport, Hongik University Station, Busan Gimhae International Airport, Jeju International Airport

*If you wish to pick up your sim card on your desired date (and not on your arrival date) and activate it by yourself, choose Hongik University Station Office as your pick up location.

*This is a prepaid SIM Card with a data-only plan. You can NOT make or receive calls. MVoIP calls via LINE, Kakao, Whatsapp or Messenger are supported.

For more info or to purchase the SIM Card, click here.


2. SIM Card – 4G/LTE Data & Voice Calls & SMS (5/7/10/15/30 day)

| Ideal for: short-term visitors & business travelers

For those who want to use a all-in-one package with high speed data, voice call and SMS for short term, this Sim Card 4G/LTE Data & Voice Call & SMS is the perfect option.

▷ For more info or to purchase the SIM Card, click here.

SIM Card Options (5-day/7-day/10-day/15-day/30-day)

Option Included
5-day/ 7-day/ 10-day/ 15-day/ 30-day SIM Card – Mobile SIM card (universal type/ Nano SIM + Micro and Standard SIM adapter if needed) – Unlimited 4G LTE data with 150Mbps Full-speed

– 100-minute voice calls (making/receiving local calls & receiving international calls)

– 100 text messages (sending – local only/receiving – local & international)

| Pick-up locations: Incheon International Airport, Gimpo International Airport, Busan Gimhae International Airport

▷ For more details or to purchase the SIM Card, click here.



3. SIM Card – 4G/LTE Data & Voice Calls & SMS (for 30 days or more)

| Ideal for: long-term visitors, international/exchange students

If you are planning on staying in Korea for more than a month and up to 3 months, then this long-term prepaid 4G-LTE SIM card is perfect for you.

With this SIM Card plan, you can enjoy phone calls, text messages and 4G/LTE data for up to 90 days after activation.

▷ For more details or to purchase the SIM Card, click here.

SIM Card Options (30-day/90-day)

30-day USIM Card 90-day SIM Card
– A prepaid SIM card (universal type)
Unlimited domestic calling for 30 days
Unlimited domestic SMS messages for 30 days
10GB of 4G/LTE Data valid for 30 days
– A prepaid SIM card (universal type)
40,000 KRW balance
Local calling/text/data rates
– Receiving calls/SMS: FREE
– Local calls (dialing) : ₩1.98/min
– Local SMS (sending): ₩22/message
– Data (4G-LTE): ₩20.48/MB
*International calls and texts are available at different rates depending on countries. Please click here to check the rates.

| Pick-up location: Hongik University Station Office (Subway Line 2. Hongik Univ. Station Exit 2)

| Operation hours: 9:00 am~6:00 pm

If you wish to extend the expiration date, be sure to visit Hongik University Station Office with your Alien Registration Card and change the SIM card (the phone number will remain the same) BEFORE the expiration date.

You can top up this SIM card at Hongik University Station Office or any GS25, CU or 7-Eleven convenience store around you.

For more details or to purchase the SIM Card, click here.

If you want to use Wi-Fi instead of a SIM Card


If you don’t have to make voice or phone calls or send text messages, then buying or renting a WiFi Egg or a Wi-Fi router, is the perfect option for you. If you want to rent one, click here.

Read more: SIM Card vs WiFi Egg: Which to Use in Korea?

If you want to buy the Wi-Fi Egg instead of renting it, you will need an Alien Registration Card (ARC), which is an ID card for foreigners in Korea. Check out our guide to getting an ARC in Korea here.

Find this blog helpful? Then stay tuned and follow this blog!

Visit Korea’s #1 Travel Shop, Trazy.com, for the most up-to-date travel information and destinations in South Korea.

118 comments

  1. Is there a pre-paid SIM card where the data is usable after the first 30 days unlike EG SIM? I travel to Korea several times a year and would prefer to not have to buy a card every time a I go.

    1. All the pre-paid SIM Cards have an expiration date, so you will have to buy the SIM Card every time you visit Korea. While the EG SIM Card can be used up to 30 days and is rechargeable, there is a prepaid 4-G LTE Data SIM Card, which is suitable for long-term foreign visitors to Korea, and you can use it up to 90 days after activation. Perhaps this can be a good option for you if you travel to Korea frequently. Please refer to the link for details: https://goo.gl/LOfZw0.

  2. Hi, I’m looking for a post paid SIM card that is less the 7,000won per month with 100mins of calls and 500mb of data. My Korean partner has one with annextel but it’s not available for foreigners. Are there options for us foreigners who want to live in Korea permanently?

  3. Hey! I will be going to Seoul shortly as an exchange student for four months. The 90 sim care you linked sounded ideal, however I will be in Korea for more than 90 days. Are there any other sim cards that you could recommend? I am mainly looking for data, yet messaging/call options would be great too! Thanks 🙂

    1. Hello Eloise! We believe that buying this long-term prepaid 4G-LTE Data SIM card is the best option since you are staying more than 90 days. 🙂 This one is catered to international students and long-term travelers staying in Korea, which allows you to make phone calls and use text messages and 4G/LTE data for up to 90 days. You can top up the balance at the customer center near Hongik University or any GS25, CU or 7-Eleven convenience stores around you. Since you are staying more than 90 days, you will have to extend the expiration date and you can do that by visiting the customer center with your alien registration card and change the SIM Card before the expiration date. The phone number will remain the same, so no worries. Hope this answers your question, and if you wish to make a purchase, here’s the link: https://www.trazy.com/experience/detail/prepaid-data-sim-card-international-student 🙂

  4. Hello,

    I’m planning to get the Prepaid 4G-LTE Data Sim Card for International Students. Can I check what do you mean by making sure the phone is unlocked? Personally I don’t have a passcode on my phone so is that ok?

    Also, I will be extending the usage to 120 days instead of the default 90 days. Can I ask at what additional price will the extension cost?

    Thanks 🙂

    1. Hello, Gynn Leow! Please refer to the below for your inquiries:
      1. Lock is meant to ensure that the phone can’t be used on any other operator’s network. If you would like to use your phone in other countries, you have to make sure your phone is a unlocked phone. You can simply check by calling the carrier in your home country and ask whether your phone is unlocked.
      2. To use the SIM card over 90 days, you have to visit the sim card office with an alien registration card. There will be an additional cost of 20,000 KRW for changing the registered information and extending the expiry date. Hope these answer your questions! 🙂

      1. Thanks for the reply.

        In my home country, I’m currently using a 4G plan with 4 GB data per month and did my calculations. Under the international plan, it is KRW 20.48/MB, that translates to KRW 20,480/GB.
        If I use my phone as per normal, I will use about 3.5 GB at the minimum. That means i’ll be paying KRW 71,680 to KRW 81,920 per month just for data.

        That is actually quite expensive! :O

        I would like to know if the KT operator has wireless that we can tap into throughout the country and not just in Seoul. Does the wireless extend to Busan, Jeju and the like? If it does, then I will be able to save on my 4G data usage.
        Thanks!

  5. Ok thank you for the reply!

    I do have one more question actually. This international student sim card does not have access to KT free wifi network, correct?
    What other plans are available that do have access to the KT free wifi network, then?

    I also saw on this website https://seoulsally.wordpress.com/tag/olleh/
    that says that you can get a prepaid LTE 2GB for 19,800 won which is alot cheaper than this international student one. So now I am abit uncertain about this.

    1. Hi Gynn Leow!
      Unfortunately, all the prepaid SIM cards on Trazy does not have access to KT free WiFi network. Also, regarding the article that you have mentioned, we doubt that the same SIM card plan is still available since the post was written in 2015. We recommend you to visit KT Olleh in Korea and get more detailed information. Instead, let me summarize the SIM cards on our website for you. Please take your time and compare with other SIM cards and choose the best one for you.
      1. Prepaid 4G-LTE Data SIM Card for International Students
      – It can be used up to 90 days after activation. (You can extend the days by visiting SIM card office with alien registration card)
      – 40,000 won balance is included in the price.
      – Rates:
      Local calls (dialing) – 1.98won/min
      Local SMS (sending) – 22won/message
      Receiving calls/SMS – free
      Data (4G LTE) – 20.48won/MB
      2. Unlimited 4G LTE Data Pacakge
      – You can choose between 5-day, 10-day, and 30-day option.
      – Enjoy unlimited data anywhere throughout Korea
      Hope this info helps! 🙂

      1. Hi Trazy crew!

        Thanks for writing up this blog post — definitely a life saver! 🙂 I will be studying for 3 months without an ARC. I am considering the 4G LTE SIM for International Students but am hesitant given I am a heavy data-consumer.

        Can I just clarify:
        For EG Sim Card and Unlimited 4G LTE Package options, there is a max of 1 SIM per person, with the longest time period being 30 days. Is it possible to recharge/renew for 3- 30-day SIMs, or are foreigners limited to 1- 30-day subscription?

        Thanks!

        1. Hello Vivian! Thank you for your compliment and we are glad that you find this post helpful. At any rate, regarding your question, the maximum days of use for our EG SIM Card (with a mobile data and voice plan only) and unlimited LTE Data Only SIM Card are 30 days. But whenever you recharge the EG SIM Card upon your need during 30-day period, you will be able to use it 30 days more per 10,000 KRW of recharge. However, we also have a 4G-LTE Data SIM Card for international students and long-term travelers, which can be used for up to 90 days. In terms of cost, we recommend you to purchase this SIM Card instead of purchasing one EG SIM Card ($23) or three 30-day Unlimited 4G LTE Data Only SIM Card (3 x $57 ea = $171) as it only costs $26 USD and already includes a balance of 40,000 KRW. You can top up this SIM Card upon your need during the 90-day period, but please do take note that since you don’t have an alien registration card you will not be able to extend the SIM Card when it expires. You can purchase the SIM Card for international students and find more info via this link: https://www.trazy.com/experience/detail/prepaid-data-sim-card-international-student Hope this answers your question! 🙂

  6. Hi. I’m actually leaving Korea with my Galaxy S 5. I was wondering if you sell phone cards and a sim card that I can use when I’m back in the US?

  7. HI THERE I JUST WANT TO ASK IF I GET THE UNLIMITED DATA ONLY SIM WILL I BE ABLE TO USE MY VIBER APP? JUST WONDERING BECAUSE I WILL BE NEEDING A KOREAN NUMBER AT THAT TO USE VIBER APP. NOT SURE THOUGH FOR ALL DATA SIM CARD. PLEASE HELP THANK YOU

    1. Hi memee manalo! The unlimited data only SIM Card does not provide you a local phone number, so in order to use Viber, we advise you to make the account and log in with your home country phone number first. Then, you will be able to use Viber with the data SIM Card you have purchased from us.

  8. hello, i was wondering. I have already owned a TP-Link 4G-LTE mobile wifi. I will be going for vacation with 2 friends for 5-6 days in Seoul. Will be going to Nami island and some other places not too far from Seoul. What is your recommendation and how can I do my reservation. thank you

  9. I am going to be in Korea for 30 days and I have a Iphone 7 Plus, which required a Nano Sim Card. Does the “Universal Sim Card” work on my phone?

    1. Hi, Heather Hong. All of the prepaid SIM Cards available on Trazy.com provide you with a universal type SIM, which is compatible with phones using standard, micro and nano SIM. If you are looking for a data-only SIM Card, you can purchase it via this link: https://www.trazy.com/experience/detail/korea-sim-card-unlimited-data. If you would like to make phone calls, send SMS and use data, this prepaid SIM Card is recommended: https://www.trazy.com/experience/detail/prepaid-data-sim-card-international-student. Hope this info helps! 🙂

  10. Hi there,

    I’ve just arrived in Korea and will be staying for a year. I already have an unlocked iPhone from South Africa and would like to buy a prepaid SIM card – that has a local number and data. Went into a few stores today and they weren’t able to assist. What would you suggest is the best option? Thanks!

    1. Hello Jenna! We recommend this Prepaid SIM Card that you can use up to 90 days, and it is the best for long-term travelers. You can make phone calls, text messages and use 4G/LTE data with this SIM Card. You can find more details or buy the SIM Card via this link: https://www.trazy.com/experience/detail/prepaid-data-sim-card-international-student. You can extend the expiration date for your SIM Card by visiting the customer center near Hongik University Station with your alien registration card. Hope this info helps! 🙂

  11. Hi there!
    Thank you so much for the comprehensive review but I have a few questions I hope you can help clarify! 🙂
    I am going on a summer exchange with a group of friends for ~35 days and I’m not sure which one of the two is the most cost effective option and I would love to hear your input!
    Do both the unlimited 4G SIM card and EG Prepaid card provide instant connection to wifi spots in Korea? (Which do not require constant logging in etc?) We are all generally heavy data users (esp on Facebook!), but with the various wifi hotspots in Seoul, the EG Prepaid card does seem like a cheaper alternative!
    Plus, we are expected to arrive at Incheon at 6am, and do you suggest purchasing it in Korea or purchase it before we arrive?
    Hope to hear a reply soon, and thanks again for clarifying all of my doubts!
    Sabrina
    (First timer in Korea!)

    1. Hi, thank you for contacting us.
      Here’s our comment for your questions.
      1. With EG Sim Card, you can use free wifi service from KT (Olleh). However if you use data constantly, it will be much convenient for you to use Unlimited Data Sim Card. The speed of 4G data is 5mbps and it will be suitable for your daily usage.
      2. If you would like to purchase the sim card at a discounted price on Trazy, please complete the payment in advance.
      We hope this answers your question. If you need further assistance, please let us know 🙂
      Thank you.

  12. Hi
    I’m going for a 12 days trip to both Busan and Seoul in July. May I ask if the unlimited data SIM card is still available to date? My friends are now in Seoul and they went to visit the booth at the INC airport but they told me that there were no data-only sim cards available.

    Also, I have an iPhone 6S – how do I check if it is locked? Previously I went to Bangkok and I managed to change to their local sim card.

    Thank you.

  13. when using a sim card purchased in korea for the duration of your visit (i.e. 30 days), do they supply a local (korean) number (i.e. 010-xxxx-xxxx) or do i continue to use my phone number from home? and if so, does that mean people in korea has to dial my foreign number to reach me even though i am in korea?

    1. Hello esbyly, you will be provided with a local Korean phone number if you purchase our “Korea SIM Card – Mobile Data (3G data) & Voice Plan (www.trazy.com/experience/detail/510)” or “Prepaid 4G/LTE Data Sim Card: 90 Days or More (www.trazy.com/experience/detail/1575)”. Please make sure to purchase either two as there is a “data-only” SIM Card as well, such as “Korea Sim Card – Unlimited 4G/LTE Data Package (www.trazy.com/experience/detail/1109),” with which you can only use data and are unable make or receive any calls. Hope this answers your question!:)

  14. I’m looking to stay in Seoul for 14 days. Unlimited data sim is ideal for me, but it jumps from 10 day to 30 day plan. Is there a way to get a 14 day plan? Or would I be able to get both a 10 day unlimited sim and a 5 day unlimited sim, but activate my 5 day sim after I finish up 10 days?

    1. Hello kitkat671! If you are staying in Korea for 14 days, we highly recommend you to purchase 1 (one) 10-day SIM Card and 1 (one) 5-day SIM Card to save the money. 🙂
      However, only 1 (one) Sim Card can be purchased per person due to policy.

      Therefore, in this case, you will first have to make your reservation for the 10-day SIM Card (Select “Incheon Airport”) and then purchase the 5-day SIM Card (Select “Hongik University Station Office”) on any date before the first 10-day SIM Card gets expired.

      *You will be given a manual from Hongik University Station branch so that you can activate the sim card on your own.
      *For details on pick-up locations, please click this link: http://www.trazy.com/experience/detail/1109

  15. I plan to go to Korea for 14 days. Unlimited data plan is ideal, however, it jumps from 10 day plan to 30 day plan. Would I be able to purchase both a 10 day unlimited sim and 5 day unlimited sim, but activate the 5 day unlimited sim after my 10 days are up?

    1. Hello katbayson! If you are staying in Korea for 14 days, we highly recommend you to purchase 1 (one) 10-day SIM Card and 1 (one) 5-day SIM Card to save the money. 🙂
      However, only 1 (one) Sim Card can be purchased per person due to policy.

      Therefore, in this case, you will first have to make your reservation for the 10-day SIM Card (Select “Incheon Airport”) and then purchase the 5-day SIM Card (Select “Hongik University Station Office”) on any date before the first 10-day SIM Card gets expired.

      *You will be given a manual from Hongik University Station branch so that you can activate the sim card on your own.
      *For details on pick-up locations, please click this link: http://www.trazy.com/experience/detail/1109

  16. Hello,
    If I get a prepaid sim card for my phone at a local 7-Eleven in Seoul, how much should I top off if I want to use data for 30 days? The 4G Unlimited Data plan sounds ideal but I cannot go back to the airport to purchase one, so what would be the best equivalent with an EG sim card?

    1. Hello ByronZ! If you purchase a SIM Card at a convenience store, the amount of money you would like to top up your SIM Card would vary depending on how much data you use. Our “Korea SIM Card – Unlimited 4G/LTE Data Package” does offer a 30-day SIM Card that you can pick it up from Hongik University Station Office, so please click this link http://www.trazy.com/experience/detail/korea-sim-card-unlimited-data if you want to purchase the SIM Card. 🙂

  17. Hello,

    I am interested in purchasing the Korea Sim Card – Unlimited 4G/LTE Data Package for 30 days. However, I still want the ability to be able to call. Is there an option where I would have unlimited 4G/LTE data + voice call? Thanks!

    1. Hello Grace Wang! The SIM Cards available on our website that provide you with a voice plan are EG Sim Card with 3G mobile data and voice plan (www.trazy.com/experience/detail/korea-sim-card-prepaid-mobile-data-eg-sim-card), which you can use up to 30 days, and a SIM Card with 4G/LTE data and voice plan (www.trazy.com/experience/detail/prepaid-data-sim-card-long-term), which you can use up to 90 days. If you would like to make voice calls, you may want to purchase either the two types of SIM Cards aforementioned. 🙂

  18. Hi Trazy,

    Thanks for the informative post! It’s really useful. For the Prepaid 4G-LTE Data Sim Card for International Students, are there any monthly data plans that I can purchase with the available balance? Or is it strictly charged based on the given rates as shown below?

    Local calls (dialing) – 1.98won/min
    Local SMS (sending) – 22won/message
    Receiving calls/SMS – free
    Data (4G LTE) – 20.48won/MB

    1. Hello 123! We’re glad to hear that you find this blog post helpful. 🙂 Regarding your inquiry, the rates are fixed for the Prepaid 4G-LTE Data SIM Card for International Students as well as for all the other prepaid SIM Cards available on our website. Hope this answers your question! 😉

  19. I move to Korea two weeks ago and still haven’t bought a SIM card. So I can just go into a GS25 and buy my SIM. I want the Unlimited 4G/LTE Data – No Voice Calls (Up to 30 days). Will the SIM card state this on the packaging?

    1. Hi IU! You can buy SIM Cards at Korean convenience stores, but we cannot assure you that you will find the SIM Card that you want to buy, which is a SIM Card with 4G LTE Data. The SIM Card with unlimited 4G LTE data (no voice calls) is available on our website and you can purchase it online via this link: http://www.trazy.com/experience/detail/1109. After your purchase is made, you can pick it up at the KT SIM Card office near Hongik University Station, which is the most accessible pick-up location within the city of Seoul. If you want a SIM Card with 4G LTE data (with voice calls) instead, please check out this link: http://www.trazy.com/experience/detail/1575. 🙂

  20. Hi there. Im staying in korea for about 40 days. I was planning get the 4g lte data with calls, so i wondering
    1. does this me its unlimited data with 4g speed?
    2. Can i make and receive calls from broad?
    3. Which plan would recommend that has unlimited data for 40days.
    Thanks.

    1. Hi Sindy! At this moment, a prepaid SIM Card that can suit all of your needs is not available. So we recommend you getting the Prepaid 4G/LTE Sim Card (www.trazy.com/experience/detail/1575), which can be used up to 30 days or 90 days.

      If you choose the 90-day option, you will be provided with a balance of 40,000 KRW and 4G-LTE data, however the data and voice calls and messages are limited.
      On the other hand, the 30-day option provides you with unlimited calls and messages but the data is limited (10GB of 4G-LTE data) and you will also have to extend another 30-day period by topping up 58,500 KRW, which is not highly recommended since you are going to stay for 40 days.

      Therefore, it’ll be best for you get the Prepaid 4G/LTE Sim Card with a 30-day option, and then additionally get the data-only Unlimited 4G/LTE Sim Card (www.trazy.com/experience/detail/1109) for your next 10 days during your stay in Korea.

      Hope this helps!

  21. Hi!
    I have a question, I am planning to get the 5 days 4G/LTE data on my trip. Although i’m staying for 6 days, how can I extend my subscription for a day? Is it possible? Thank you!

  22. Hi
    I am going to Seoul for 9 days.
    However, I need to use Google Maps on my phone to get around in Seoul – and at the same time I would like to be able to make calls.
    What is the best option for me regarding SIM card?

    1. Hello, Bodil Bering! We do have a prepaid SIM Card with a 10-day option, however voice calls are not available for this SIM Card. Therefore, the best option for you is our Prepaid 3G Sim Card with Data, Voice Call and SMS, which you can use up to 30 days. You can make your purchase via this link: http://www.trazy.com/experience/detail/510 Hope this helps!

  23. Hello! What is the cheapest way to get internet for just a day? I just have a 15hr layover and need internet to get around the city. Please and thank you!

  24. Hello… I’ll be visiting south korea next week.. I just wanna know if i am allowed to buy a phone in seoul if i am just a tourist. Hope to hear from you guys. Thanks in advanced.

    1. Hello, Belle. You can buy a phone in Korea even if you are a tourist, but you will have to pay full price for the phone. So instead of buying, renting a phone or buying a prepaid SIM Card can be a better option. You can purchase your prepaid SIM Card (www.trazy.com/experience/detail/1109) on our website or if you’d like to rent a phone in Korea, please contact SK Telecom (+82-02-6343-9000 from abroad or 080-2525-011 from domestic) or visit their website for more details (www.skroaming.com/reserve/reserve_phone.asp). Hope this info helps!

    1. Hello Nic! We cannot guarantee that our prepaid SIM Cards will be compatible with your Wi-Fi router. The SIM Card might work if it is compatible with your device, however you will able to find out once you purchase and receive your SIM Card and insert into your WiFi router. Please take note that the prepaid sim cards are non-refundable once you receive. Hope this answers your question. 🙂

  25. Hi, If I have an wifi egg (Huawei) device that covers 4G/LTE for Korea, can I just buy a prepaid sim and put it into the wifi egg to use data?

    1. Hello John! We cannot guarantee that our prepaid SIM Cards will be compatible with your Wi-Fi router. The SIM Card might work if it is compatible with your device, however you will able to find out once you purchase and receive your SIM Card and insert into your WiFi router. Please take note that the prepaid sim cards are non-refundable once you receive. Hope this answers your question. 🙂

  26. Hi, I am planning to purchase a 5 day SIM card. If I pick up the SIM card at Incheon Airport at 18:00 on 1st Jan, does the 120 hours start from 18:00 1st Jan? If so, does that mean the SIM will expire at 17:59 on 6th Jan? Thank you.

    1. Hello Charlie! Yes, you are correct. It is calculated on a 24-hour basis from the moment of activation and so the 5-day SIM Card is valid up to 120 hours upon activation. Hope this answers your question! 🙂

  27. If all I want is to just send/receive SMS, which pre-paid SIM is the best option? I’d like it to last for as long as possible. Thanks 🙂

    1. Hi Fambi! Regarding your question, There are 2 options for you: Prepaid 4G/LTE Sim Card: Data+Voice call+SMS (up to 30 days) or Prepaid 4G LTE Sim Card: Data+Voice call+SMS (30 days or more). Please refer to the below for the details:

      1. Prepaid 4G/LTE Sim Card: Data+Voice call+SMS (up to 30 days)
      1) 1GB Prepaid Sim Card
      – 275 minutes of calls to the U.S. (or 1GB of 4G LTE Data)
      – Unlimited incoming calls and SMS
      2)2GB Prepaid Sim Card
      – 550 minutes of calls to the U.S. (or 2GB of 4G LTE Data)
      – Unlimited incoming calls and SMS

      2. Prepaid 4G/LTE Sim Card: Data+Voice call+SMS (30 days or more)
      1) 30-day Unlimited SIM Card
      – Unlimited domestic calling for 30 days
      – Unlimited domestic SMS messages for 30 days
      – 10GB of 4G LTE Data valid for 30 days

      For further details, please check this link: https://www.trazy.com/experience/detail/korea-sim-card-prepaid-4g-mobile-data / https://www.trazy.com/experience/detail/prepaid-data-sim-card-long-term
      Thank you!

  28. Hi,

    I would be sharing a WiFi router with my traveling partner but because I need to have a Korean number I would need to get a Sim Card as well. Is there any card that lets me make local calls and sms but has no or minimum data so that it is not costly?

    Thank you!

  29. Hi trazy,
    I just bought KT sim. I am new about Korean telecom. I have 2 questions:
    1. I want to make sure it contains prepaid service. How to check with my phone to know prepaid service is activated?
    2. How to check my balance?

    1. Hello sopheak, as soon as the prepaid sim card is activated on your phone, you will be able to use the service with the prepaid amount. Please make sure to check and see if your sim card is working successfully before leaving the booth.
      The ways of checking the balance may differ depending on the sim card company. We recommend you to check with the staff at the booth upon collecting the sim card for more details 🙂

  30. Hi Trazy Crew,
    For the 90 days Pre-Paid Sim Cards, does it mean that when we paid USD 26, it will come with 40,000 KRW of balance to be used. It is equivalence to around 1.953GB of data usage or 337 hours talk time or 1818 SMS? What is this statement as indicated in the 90 days Pre-paid SIM Card mean “*If you buy the SIM card separately without balance, it is 8,800 KRW.”?

    Thanks as your help.
    Best Regards,
    KW

    1. Hi KW Phua,
      Yes, you are correct. The 90-days Pre-Paid Sim Cards come with 40,000 KRW balance which you can use call, SMS and 4G data at a designated rate. Purchasing the SIM card separately is not available according to the local operator’s internal issue at the moment. If you would like to purchase this pre-paid sim card, please click this link for further information: https://www.trazy.com/experience/detail/prepaid-data-sim-card-long-term

  31. Hello! I will be in Seoul for 30 days in April and wonder what’s best for me. I want to have lots of data and be able to call within the country. Is it true that I can’t use wifi if i buy these pre-paid cards? thank you

    1. Hi Fanny, in that case, we highly recommend you to check out the 30-day Unlimited SIM Card from this link: https://www.trazy.com/experience/detail/prepaid-data-sim-card-long-term
      The SIM Card will provide you 10GB of 4G/LTE Data along with unlimited domestic calls/SMS messages valid for 30 days.
      *This SIM card does not have access to KT (Olleh) free wifi network but you can still use non-carrier free wifi networks such as free wifi networks provided in Starbucks or at some tourist destinations.

  32. I will be in Korea from April 12 to May 2. I would like to make domestic phone calls in Korea. Also I would like to send text messages to my family in the United States. Also how can I use the internet on my IPad. What are my best options.

    1. Hi Luis 🙂
      Regarding your inquiry, international texts are available only with 90-day SIM Card. If you need to use domestic phone calls as well as international texts, we recommend you to purchase this sim card. However, please note that this one is not suitable for people who use data more than 1GB per month.
      If you are planning to use more data, 30-day Unlimited SIM Card (59 USD) may suit you better.

  33. Hi, thank you for the very informative post. I was hoping for some advise, are there differences in the speed of the prepaid SIM and the wifi egg? Also, if I get the prepaid SIM, I can use my phone as a hotspot, right?

    1. Hi Josh,
      All SIM cards and portable wifi device provides speed at a 4G/LTE speed. However, there may be a limitation on data speed depending on the package.
      – Unlimited Data ONLY SIM card: Unlimited data at a 5mpbs speed
      – Data&Voice calls&SMS (5/7/10/15/30 day): After using 10GB of 4G/LTE data, the speed will slow down to 400kbps (unlimited)
      – Portable wifi device: After using 1GB of 4G/LTE data, the speed will slow down to 400kbps (unlimited)
      – Data&Voice call&SMS (for 30 days or more): No limitation
      +)You can use your phone as a hotspot with the prepaid SIM card. Please note that the speed may get lower.

  34. Hi for the Prepaid 4G/LTE Sim Card: Unlimited Data+Voice call+SMS (5/7/10/15/30 days) package, will we be able to call with whatsapp as well?

  35. Hello, I will be travelling to Jeju next week. Is there any voice call SIM card options that can be picked up there. I’ve checked the KT website but they require credit-card deposit and SIM card return so it’s kinda troublesome. Thank you.

    1. Hello Mi Nguyen,
      Unfortunately, the local SIM Card company does not provide pickup service for voice SIM card options at Jeju Airport at the moment. We are sorry about that ;(

  36. Hi.
    I will be staying in Korea for 80 days, and I need unlimited data card.
    Can I rent a Data SIM card for more than 30 days?
    The issue I am finding is that for regular SIM card I need credit card (which I dont have – only debit).
    And if it is not possible to get Data SIM card for more than 30 days, would it be possible to simply rent one for 30 days, then another one after that for another 30 days?
    Thanks!

    1. Hi Milos 🙂
      Regarding the data SIM card, it is not possible to extend it. If you would like to use more than 30 days, we recommend you to purchase another SIM card (pickup is available at Hongik Univ. Station branch) after the first one expires.

  37. hi,
    I will in Korea for 15days by next week, i abit confuse EG Sim and the data+voice plan diffrent. if mostly only use for GPS navigation and FB uploading which plan are suitable? If I buy the sim from Trazy will be require return the SIM while i leave Korea?

  38. I got a data only plan at the airport for 5 days with LG U+. When the phone was active the increasing bars that indicate cellular strength filled up all the way. After the expiration date the bars all went away. I expected myself to no longer use data on my phone but I am actually still able to. It’s been 2 days and I have been constantly on my phone on Instagram, Browser, Etc.

    I am worried because I am staying here for another 2 months and was wondering if I will be penalized. I did provide my credit card to them but so far I have not been charged for anything. Do I have anything to worry about?

    1. Hi Jeremy 🙂
      In that case, we highly recommend you to contact the local SIM card company where you activated or purchased the SIM card. They will be able to check your current status and assist you further.

  39. Hello, how can I get in touch with someone about recharging my 30+ day sim card by bank transfer??

    How much is it to recharge and extend the expiry date? I paid 24000 won originally.

    1. Hi hz 🙂
      Please contact us at ‘experience@trazy.com’. Our crew will check your booking and assist you further.

  40. Hello, i will be going to korea to study KR language for 1 year + depending on the progress.
    Dont seem to have that information in your post. do you know which value SIMcards or which telco is best for this duration?

  41. Hi, if I buy the 10 day sim card, Prepaid 4G/LTE Sim Card: Unlimited Data+Voice call+SMS, can i make skype calls with it?

    1. Hi Neil,
      Yes, with the SIM card mentioned, MVoIP calls via LINE, Kakao Talk, Whatsapp, Skype or etc. is available.

  42. Hi, I’m going to Seoul from July 12th 2018 to January 2019 and I’m wondering what is the difference between Prepaid card and “normal” card ? Like the advantages and disadvantage.
    Also, I would like to know, if with this kind of prepaid card, can I register to things like Melon which requires “Korean phone or I-pin” ?

    Thank you

    1. Hello Manon,
      There’s no technical difference between the prepaid and postpaid SIM card 🙂 If you are planning to sign up on websites, which requires the verification process, you can simply do so by activating the SIM card with your Alien Registration Card (ARC) instead of the passport.

  43. Hi,
    My sister and I will be traveling to Seoul, South Korea from 6/26-7/13, and want to know the best phone plan options. Is it better to purchase the sim card or to get a “cheapie” separate phone for that time period? If we chose the phone option, where could we purchase a phone inexpensively in Korea? My current phone is on the T-Mobile network, and I read online that the network is compatible in South Korea…is this true?

    Thanks, in advance!

    1. Hi Phil 🙂
      Yes, the payment can be done via credit/debit card or cash on Trazy. However, regarding the portable wifi device rental, please make sure you must present your credit card at the pickup booth. The staff will hold your credit card open for the security deposit during your rental.

  44. i will be doing my internship in south korea for 75 days, i am mostly looking for data. What sim card
    do u suggest for me to use?

  45. Hi,
    I’m moving to Korea on a 2=year contract, is there a SIM that you could recommend to me, please?
    Thank you for your help, Sarah

    1. Hi Sarah 🙂
      First, you can purchase one of the long-term SIM cards upon arrival, which can be used up to 90 days. Then, once you have your alien registration card, you can extend it for a longer period of time by visiting the office before the SIM card expires.

  46. My son is in Seoul now to study language. He’s 18, born January, 2000, but by Korean convention won’t be 18 until January. He’s having trouble getting a SIM card through usual outlets. Can you provide him a prepaid SIM card before then?

  47. Hi, I’m looking for the best way to be connected during my stay in South Korea. From August 29th till September 11th I’ll be touring through the country and i’d like to use internet especially for the GPS on my iPhone. From August 27th till August 29th and September 11th till September 14th I’ll be visiting Seoul but I’ll probably don’t need internet. What would you advice?

  48. Hi, I am a foreign student who is now studying in Korea. My phone was a gift from an acquaintance and it is unlocked samsung s7 edge of lg u+. May I ask that is my phone able to use these sim cards?

    1. Hi Long H Vu, if the device is from LG U+, KT SIM cards may not work properly. It is recommended for you to visit the office located near Hongik University Station office and check with the staff for the exact information. For further questions, please contact Trazy customer service at ‘experience@trazy.com’.

  49. I have a Moto G XT1032 which is 3G. You mention 3G Bands: HSDPA 2100MHz/HSDPA+ but there is no mention of you selling a 3G sim card. Do you sell such a card and where can I pick it up. I fly into Seoul Inchion on Friday 19th in the morning. Thanks

  50. Hi there,
    I’m in Seoul for the next ten days and have a US cell phone that give me unlimited data here for free. However, calls are pretty expensive. I’ll be making 5-10 calls a day. Are there any SIM card options for calls only? I know may be a hassle but I don’t mind switching cards to make calls.

    Or does Korea have any inexpensive prepaid “burner” phone options?

    1. Hi Nana! At Trazy, we don’t have any sim card package that is only for phone calls. At the moment, we don’t have any “burner phone” package but SK Telecom has a phone rental service. If you would like to rent the phone, visit any of their branches and get the assistance of the staff on-site.

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.